| Chaunaca Formation | |
| Type: | Geological formation |
| Period: | Campanian |
| Age: | Campanian |
| Prilithology: | Sandstone |
| Namedfor: | Chaunaca |
| Region: | Chuquisaca Department |
| Coordinates: | -19.1°N -65.5°W |
| Paleocoordinates: | -22.4°N -47.1°W |
| Unitof: | Upper Puca Group |
| Overlies: | Aroifilla Formation |
| Extent: | Subandean Belt |
The Chaunaca Formation is a Campanian geologic formation of Bolivia. Fossil sauropod tracks have been reported from the formation.[1] [2]